I would try to buy properties starting at a specific date so not large ticket items come up.

This property needed an extreme amount of clean up and haul away of items left behind.

Will not yet be ready for window treatments as the renovation is still ongoing, and getting closer to time when itemized list of damages are to be furnished. 

If so, are you concerned about Spain's tax system on worldwide items?

turnkey section 8 is not going to be like buying a brand new home there will always be differed items or stuff that does not work etc.. age of homes makes this impossible. then you add section 8 tenants and  there you go

A savings to put deposits and another account for everything elseyou don't need separate bank accounts as accounting software will classify all of those items.

But enough to make to do all the cosmetics along with a few major items like HVAC, appliances, etc.

@Mary Jay yes and that’s counting even big ticket item repairs averaged out so my monthly is actually higher. 

With that being said, in a worst case scenario, you can always hire a property management company to handle the day to day items if it comes to that. 

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.